Answer
20.6 ft
Work Step by Step
Substitute the given base position and simplify.
$\sqrt {(5)^2+(4\times5)^2}\longrightarrow$ multiply within parentheses
$=\sqrt {(5)^2+(20)^2}\longrightarrow$ simplify exponents
$=\sqrt {25+400}\longrightarrow$ add
$=\sqrt {425}$ find the square root
$=20.6$
